Auth bypass in Espocrm
CVE-2026-90934
EspoCRM before 10.0.4 contains a field-level security bypass vulnerability in the meeting and call attendees endpoints that allows authenticated users to read restricted email addresses. Attackers can recover hidden attendee emails by exploiting incorrect ACL scope validation that checks parent event permissions instead of attendee entity permissions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/espocrm/espocrm/security/advisories/GHSA-hpgx-8qg3-5w7v (vendor-advisory)
- www.vulncheck.com/advisories/espocrm-before-10.0.4-field-level-security-bypass-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90934?
- CVE-2026-90934 is a medium-severity vulnerability in Espocrm, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-09-14.
- How severe is CVE-2026-90934?
- Medium severity. CVSS v3 base score is 4.3 out of 10.